Osteopontin: role in extracellular matrix deposition and myocardial remodeling post-MI.

Osteopontin: role in extracellular matrix deposition and myocardial remodeling post-MI.
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DOI:
10.1016/j.yjmcc.2009.06.015
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发表时间:
2010-03
影响因子:
5
通讯作者:
Singh, Krishna
Singh, Krishna
中科院分区:
医学2区
文献类型:
--
作者:
Singh, Mahipal;Foster, Cerrone R.;Dalal, Suman;Singh, Krishna

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心肌梗死(MI)后重构与左心室(LV)扩张、心功能下降和死亡率增加有关。细胞外基质(ECM)蛋白的动态合成和降解在MI后心肌重塑中起重要作用。心肌梗死后心脏骨桥蛋白(OPN)表达增加。有证据表明,OPN的缺乏诱导LV扩张,这与胶原合成和沉积减少有关。抑制基质金属蛋白酶,心肌梗死后ECM重塑过程中的关键作用者,增加ECM沉积(纤维化),改善心肌梗死后缺乏OPN的小鼠的LV功能。本文综述了1)导致心脏中OPN表达增加的信号通路; 2)缺乏OPN的小鼠MI后心脏结构和功能的改变; 3)MI后OPN介导的ECM重塑机制。
Remodeling after myocardial infarction (MI) associates with left ventricular (LV) dilation, decreased cardiac function and increased mortality. The dynamic synthesis and breakdown of extracellular matrix (ECM) proteins play a significant role in myocardial remodeling post-MI. Expression of osteopontin (OPN) increases in the heart post-MI. Evidence has been provided that lack of OPN induces LV dilation which associates with decreased collagen synthesis and deposition. Inhibition of matrix metalloproteinases, key players in ECM remodeling process post-MI, increased ECM deposition (fibrosis) and improved LV function in mice lacking OPN after MI. This review summarizes - 1) signaling pathways leading to increased expression of OPN in the heart; 2) the alterations in the structure and function of the heart post-MI in mice lacking OPN; and 3) mechanisms involved in OPN-mediated ECM remodeling post-MI.
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